Wilbur f



(No Model.)

W. P. DIAL.

SEWING MACHINE. No. 350,045. Patented Sept. 28, 1886.

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40K lw Wat/TIM n nphcr. Washington. 02 C UNITED STATES PATENT OFFICE.

\VILBUR F. DIAL, OF BRIDGEPORT, CONN., ASSIGNOR TO THE \VHEELER & XVILSON M.-\NUFA.CTURING COMPANY, OF SAME FLAG d.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent. No.350,045, dated September 28, 1886.

Application filed January 2'2, 1886.

T0 to whom it may concern.-

Be it known that I, WILEUR F. DIAL, of Bridgeport, county of Fairtield, and State of Connecticut, have invented an Improvement in Sewing-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention has for its object to provide novel means for rotating a loop-taker in a loop-taker guide or race, and is an improvement on that described in United States Patent No. 328,165, dated October 112;, 1883, to which reference may be had.

Myinvention consists, essentially, in a looptaker guide, a loop-taker provided with two notches, a grooved plate, and a shaft having a disk grooved at its face, combined with a slide-bar fitted into the groove of the said disk, and having at one end a roller-stud to enter the groove of the said plate, and at its other end with a horn to enter one and then another recess of the loop-taker. to pull the same positively about in the loop-taker guide, as will be described.

In the patent referred to, theloop-takerguide was seteccentrieally to the center of rotation of a variably-rotating shaft having connected to it a saddle to extend partially around the bridge of the loop taker, the said saddlehaving a ing to enter a recess in the loop-taker back of its point or beak, to at times pull the looptaker, the point of the saddle at other times acting against the heel of the loop-taker and pushing it in its circular path.

In this my present machine the center of the looptaker guide is concentric with the center of the variably-rotating shaft, and the loop-taker is drawn continuously forward in the looptaker guide by a horn carried by a sliding arm operated by a cam, and having a movement in the line of the diameter of the loop-taker, as will be described, so that first one and then the opposite end of the horn (both in a line intersecting the center of the loop-taker) will engage and pull the looptaker forward to enter and pass through the loop of needle-thread carried by the usual eyepointed needle.

My invention consists, essentially, in a ro- Scrial No. 189,393. (No model.)

tatin g shaft having an attached disk provided with a groove, a loop taker guide, a plate having a groove, and a loop-taker provided with horn -receivi ng recesses, combined with a slidebar carried by the said disk and reciprocated therein by the said groove, and having a horn provided with two projections to enter the recesses made in the loop-taker and pull the loop-taker continuously forward in the looptaker guide, substantially as will be described.

Figure 'l is a front elevation of a sufficient portion of a sewing-machine below its bedplate, which, taken in connection with the machine shown in the said patent, will enable my present invention to be understood, the bobbin case or holder being omitted; Fig. 2, a partial section of Fig. l in the dotted line at x, the bobbin-holder being shown in place; Fig. 3, a detail in front view of the loop-taker guide, the loop-taker therein, and the horn to engage and rotate it, the cam-groove for moving the slidc-bar carrying the horn being shown by dotted lines and the bobbin and bobbin-case being omitted. Fig. l. is an edge and face view of the variably-rotating shaft and its disk; Fig. 5, a detail showing the slidebar provided with the horn, and Fig. (i an inner view of the loop-taker guide and the cam-groove to move the slide.

The bed-plate A, the hanger or bracket D, the main shaft B, the disk or crank 3, the variably-rotating shalt B, the plate a to keep the loop'taker in the loop-taker guide, the bobbin-ease (1, having a bobbin within it and provided with a projection, a, are all substantially as in the said patent, where they are designated by like letters. The loop-taker guide H, attached to the hanger D by screws 12 13, and bored centrally to surround the hub D, forming part of the hanger D, has cut into it a circular way for the reception of thelooptaker G, which is substantially the same in construction and operation as the loop-taker designated by like letter in the said patent, the only difference being that herein the looptaker is provided with two recesses, 2 4, in line with eachother, to receive alternately the outwardly-projecting end (3 and then the inwardly-proj eeting end 7 of a horn attached to a slide-bar, m, fitted into adiametrical groove,

m, of a disk, m connected to the front end of the variably-rotating shaft B.

The loop-taker herein described, is fully described in another application, Serial No. 189,392, filed January 22, 1886.

The slidebar m, provided with the horn re ferred to, which is herein shown as T-shaped, has at its end opposite the said horn a stud, 14, which is provided with a loose block or follower, 15, that enters a groove, 16, made herein in a plate constituting the back of the loop-taker guide,.the said groove being eccentric to the center of rotation of the shaft B", so that the said slide-bar, on the rotation of the shaft,'(the slide-bar being rotated in unison with the disk 0729,) is made to move longitudt, nally in the groove m, and in so doing the projection 6 of the horn is made to slide into and to then draw out from the recess 2, and the projection 7 is made to enter and then to withdraw from the recess 4, one or the other of the said projections constantly engaging the loop-taker near the shoulder at the rear end of its beak or point 9, thus drawing instead of pushing the loop-taker through the usual loop of needle-thread;-the entrance and withdrawal of the projections 6 and 7 into the recesses 2 and 4 beingin such time and order with relation to the movement of the usual eye-pointed needle as to permit the passage of the looptaker through the loop of needle-thread.

Patent of the United States No. 304,708, granted to me, shows a circular shuttle pro vided just back of its point with a round hole to receive a studor pin projecting from the face of a disk at one side of its center of rocrank-pin extended from the face of a rotating disk, the pin being provided with an enlarged head to'keep the shuttle on the pin, the said pin also receiving uponit a link which is jointed to a second link pivoted to the frame of the machine, the crank-pin constantly drawing the shuttle in a forward direction, an open yoke preventing the shuttle from being thrown out of place by centrifugal action, the groove in the crank-pinbeing effectual in permitting the discharge of theloop of needle-thread.

I claim- The rotating-shaft. B", its attached disk having a groove, m,'theloop-taker guide, the plate having the groove 16, and the loop-taker provided with horn-receiving recesses, combined with the slide-bar carried by the disk and reciprocated therein by the said groove, and having a horn provided with two projections to enter recesses in and pull the loop-taker continuously forward in the loop-taker guide, substantially as described.

- In testimony whereof Ihave signed my name to this specification in thepresence of two subscribing witnesses.

winnnn F. DIAL.

Witnesses:

ISAAC HOLDEN, LOUIS H. BAKER. 

